custom projection definition

[jachym.cepicky@…]

Hallo,

maybe i do something wrong, but:

I would like to define my custom projection "Krovak S-JTSK" with following parameters:

Name: sjtsk Parameters: +proj=krovak +ellps=bessel +no_defs +towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56

It is not possible to add custom projection to QGIS. When I click on the "Save" button, nothing is saved.

when I try to add just something common: Name: myproj Parameters: +proj=latlong +ellps=WGS84

It can not be saved either.

In sqlite: sqlite> select * from vw_srs; sqlite>

In the command line, only two lines appear:

QgsCustomProjectionDialog::getProjFromParameters() QgsCustomProjectionDialog::getEllipseFromParameters()

And, I would say, the test does also not work, how expected:

I would say, that North and East are changed and when I try

Parameters: +proj=latlong +ellps=WGS84 North: 12 East: 24 the result is 0.2084 0.4189

is it wrong, that I'm expecting "12 14" ?

echo "12 24" |cs2cs +proj=latlong +to +proj=latlong +ellps=WGS84 12dE 24dN 0.000

??

short summary: 1) It is not possible to save custom projection 2) the "test" of custom projection does not work properly

qgis_unstable 0.8 fresh svn, build with dpkg-buildpackage on ubuntu 6.06

Thanks

Jachym

P.S. Problem confirmed on debian testing

[g_j_m]

To make a new custom projection you first need to click on the 'new' button in the dialog box, then enter your projection parameters and name, then click on 'save'.

However, this is a bit counter-intuitive, especially when doing the first custom projection, so I've made a change so that if there are no custom projections the dialog automatically does a 'new' button click for you. This is available in SVN r5778.

[vslavik@…]

I'm able to add the krovak projection as above now that I know how the 'new' button behaves, but the projection still does not show up in Settings -> Project Properties -> Projection -> User Defined Coordinate Systems. Other projections, e.g. the latlong one from above, do show up correctly.

I finally tracked this down to missing dvorak entery in the tbl_projection table. Adding the entry to ~/.qgis/qgis.db like this:

INSERT INTO "tbl_projection" VALUES('krovak', 'S-JTSK / Krovak', '', '');

fixed the problem, but I have no idea whether the line is correct or not (I'm new to GIS and hit the problem when following instructions on setting QGIS up for Czech users).

[g_j_m]

The reversed north/east problem appears to be fixed in svn r5935. That just leaves the missing entry in the tbl_projection table mentioned above.

[g_j_m]

Fixed in SVN r5943 - the krovak projection was missing from the qgis.db database (but was in the srs.db database)

[(none)]

Milestone Version 0.8 deleted